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Magnetically propagating Hund’s exciton in van der Waals antiferromagnet NiPS3

https://doi.org/10.1038/s41467-024-47852-x

He, W ; Shen, Y ; Wohlfeld, K ; Sears, J ; Li, J ; Pelliciari, J ; Walicki, M ; Johnston, S ; Baldini, E ; Bisogni, V ; et al ( April 2024 , Nature Communications)

Abstract
Magnetic van der Waals (vdW) materials have opened new frontiers for realizing novel many-body phenomena. Recently NiPS₃has received intense interest since it hosts an excitonic quasiparticle whose properties appear to be intimately linked to the magnetic state of the lattice. Despite extensive studies, the electronic character, mobility, and magnetic interactions of the exciton remain unresolved. Here we address these issues by measuring NiPS₃with ultra-high energy resolution resonant inelastic x-ray scattering (RIXS). We find that Hund’s exchange interactions are primarily responsible for the energy of formation of the exciton. Measuring the dispersion of the Hund’s exciton reveals that it propagates in a way that is analogous to a double-magnon. We trace this unique behavior to fundamental similarities between the NiPS₃exciton hopping and spin exchange processes, underlining the unique magnetic characteristics of this novel quasiparticle.

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Free, publicly-accessible full text available April 29, 2025
An Explainer for Temporal Graph Neural Networks

He, W ; Vu, M. ; Jiang, Z ; Thai, M.T. ( January 2022 , IEEE Global Communications Conference)

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Evidence for a spinon Kondo effect in cobalt atoms on single-layer 1T-TaSe2

Chen, Y. ; He, W.-Y. ; Ruan, W. ; Hwang, J. ; Tang, S. ; Lee, R. L. ; Wu, M. ; Zhu, T. ; Zhang, C. ; Ryu, H. ; et al ( September 2022 , Nature physics)

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Pair Programming: Leveling the Field for Students with Learning Disabilities

Watson, S. ; Li, L. ; Xu, L. ; He, W. ; Pribesh, S. ; Major, D. ( March 2021 , Society for Information Technology & Teacher Education International Conference)
SITE (Ed.)
This paper is the report on the findings of a three-year study conducted in undergraduate computer science courses. It also describes the changes made to deal with COVID-19 during the summer and fall of 2020. We collected data on over 800 students with approximately 35 students identified as having learning disabilities (LD). These students were not professional programmers in a computer science department; rather, they were students from a Business College. Our preliminary results show that pair programming improved (a) teamwork and communication between the pairs; (b) confidence in students; and (c) comprehension and learning for all students. Thus, our preliminary results indicate that pair programming improved everyone’s performance. Educators should consider the importance of collaboration with other disciplines when creating inclusive environments for students with disabilities.
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Using pair programming as a collaborative learning approach to support students with learning disabilities via Zoom breakout rooms

Li, L. ; Xu, L. ; He, Y. ; He, W. ; Watson, S. ; Pribesh, S. ; Major, D. ( March 2021 , Society for Information Technology & Teacher Education International Conference)
SITE (Ed.)
Peer learning through pair programming is a type of collaborative learning that involves students working in pairs to discuss computer programming concepts or develop codes to solve problems. The Zoom breakout room method is applied to teach pair programming in a virtual classroom during the COVID-19 environment. By facilitating pair programming in a virtual learning environment, we gained valuable experience in promoting collaborative learning, active learning, and problem-based learning activities in a cloud setting.
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Correlations of event activity with hard and soft processes in p+Au collisions at sNN=200 GeV at the RHIC STAR experiment

https://doi.org/10.1103/PhysRevC.110.044908

Abdulhamid, M_I ; Aboona, B_E ; Adam, J. ; Adamczyk, L. ; Adams, J_R ; Aggarwal, I. ; Aggarwal, M_M ; Ahammed, Z. ; Aschenauer, E_C ; Aslam, S. ; et al ( October 2024 , Physical Review C)
Observation of the antimatter hypernucleus $${}_{\bar{{\boldsymbol{\Lambda }}}}{}^{{\bf{4}}}\bar{{\bf{H}}}$$

https://doi.org/10.1038/s41586-024-07823-0

Abdulhamid, M I ; Aboona, B E ; Adam, J ; Adamczyk, L ; Adams, J R ; Aggarwal, I ; Aggarwal, M M ; Ahammed, Z ; Aschenauer, E C ; Aslam, S ; et al ( August 2024 , Nature)

Free, publicly-accessible full text available August 29, 2025
Collision-energy dependence of deuteron cumulants and proton-deuteron correlations in Au+Au collisions at RHIC

https://doi.org/10.1016/j.physletb.2024.138560

Abdulhamid, MI ; Aboona, BE ; Adam, J ; Adamczyk, L ; Adams, JR ; Aggarwal, I ; Aggarwal, MM ; Ahammed, Z ; Aschenauer, EC ; Aslam, S ; et al ( August 2024 , Physics Letters B)

Free, publicly-accessible full text available August 1, 2025
Exclusive J/ψ, ψ(2s) , and e+e− pair production in Au+Au ultraperipheral collisions at the BNL Relativistic Heavy Ion Collider

https://doi.org/10.1103/PhysRevC.110.014911

Abdulhamid, M_I ; Aboona, B_E ; Adam, J. ; Adamczyk, L. ; Adams, J_R ; Aggarwal, I. ; Aggarwal, M_M ; Ahammed, Z. ; Aschenauer, E_C ; Aslam, S. ; et al ( July 2024 , Physical Review C)
Estimate of background baseline and upper limit on the chiral magnetic effect in isobar collisions at sNN=200 GeV at the BNL Relativistic Heavy Ion Collider

https://doi.org/10.1103/PhysRevC.110.014905

Abdulhamid, M_I ; Aboona, B_E ; Adam, J. ; Adams, J_R ; Agakishiev, G. ; Aggarwal, I. ; Aggarwal, M_M ; Ahammed, Z. ; Aitbaev, A. ; Alekseev, I. ; et al ( July 2024 , Physical Review C)

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